I'm saying they don't have enough data to draw the conclusions they are drawing.
What led you to say this? You can determine the mass, size, and orbit of planets by the dimming of the star as it passes in front of it as well as the Doppler shift of the star as it wobbles in response to planets. Combining both the size and mass of a planet you can determine its density which tells you if it is gaseous or rocky planet. You can determine the Goldilocks zone of a star by measuring its luminosity.
It seems that you simply don't want scientists to know these things.
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